Actual distance = distance on map x the scale:
3 inches x 15 miles per inch = 45 actual miles.
Yes it is linear because the value of the first x is not negative
The lowest common denominator of 6 and 10 is 30.
Size 40 is the cheapest, because the formula to find lowest price of unit is dividing the price by the unit. so 5.49/24≈ 0.23, 8.00/40=0.2, 15.99/64≈ 0.25
0.5 to the fourth power equals 0.0625.
